I know this is probably more sutied for Gamecube rather than Wii, but I've had little luck there and as active as this board is, I was hoping people here might be able to offer some help.

I have a Nintendo Wii modded with a D2Ckey. It plays back-ups, so far, perfectly (including Brawl). However, I am interested in back-uping some Gamecube games to play on my Wii, as well. I've been searching for a while and everything I've found points to using the GameCube, BBA and PSO to rip the game, but I don't have any of those things.

I was hoping someone here knew about any options for using my PC or Wii to rip my GameCube game and in turn back it up onto a normal DVD+R, since I've heard you can play GameCube games from DVD+Rs.

I know only two ways to backup GameCube games
1. As you mentioned you need a GC, a BBA and PSO or a modchip
2. You can backup GC games the very same way as Wii games, with a LG-8164b (8163, 8162 and 8161 are also working) and RawDump. This is the easiest way, you only have to click "dump". If you don't have one of those drive, I suggest you go buy one, they're around 30$.

Then you can burn the iso directly on a DVD±R or you can make a multi game iso with GCOS Multigame Creator v4.